A224368 Number of n X n 0..2 arrays with rows unimodal and antidiagonals nondecreasing.

3, 54, 1838, 77793, 3607078, 174854516, 8684742989, 437757725110, 22283207886650, 1142441203546438, 58904154561219603, 3051594326913582293, 158760240705250821719, 8291742411017787312243, 434658935860309950718887

Offset: 1

Author

R. H. Hardin Apr 05 2013

Keywords

• nonn

Comments

Diagonal of A224374

Examples

			Some solutions for n=3
..0..0..0....2..0..0....0..0..0....1..2..0....2..1..1....1..0..0....1..1..0
..0..1..1....2..1..0....1..0..0....2..2..1....2..1..0....1..0..0....2..0..0
..1..1..0....1..1..2....2..2..1....2..1..0....1..2..0....0..2..0....1..1..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..24